@ZeeJay1997: Yep that is exactly what I paid for. Man, wish I could have found it on the threads here first... :/ O well. I made a mod to it though by wrapping the screws with a decent amount of electrical tape. I figured that since there was a low possibility of the screws actually hitting the PCM and shorting it out, there had to be some other kind of grounding going on that still dealt with the screws. I haven't seen the inside of the PCM so this is just my hypothesis and my associated reasoning:
Since the screws probably weren't hitting the board itself, there had to be an electrical jump toward the path of least resistance (the screws). Given that the distance between the board and the screw was most likely very small (I would have to say less than a 1/8 inch but could even be greater) this is a probable dielectric jumping situation. The air between the screw and the point on the board where the electricity jumps has a dielectric capacity of 1. As the air heats up, the density of the air in that pocket lowers and as such the dielectric value of that space becomes closer to that of a vacuum, which is zero.
In a vacuum if you have two plates connected to a end of a battery, electricity will freely flow between the plates in the vacuum. For reference <http://www.youtube.com/watch?v=XU8nMKkzbT8>. Since the dielectric resistance of the air is less than normal when heated, there are certain times when the flow of electrons through the board will "jump" to the the screw to be grounded since the path of resistance through the air is less than that of the circuit board and electricity always seeks to go through the path of least resistance. Thus a grounding takes place. The screw is in contact with the PCM shell which can act as a ground in this situation. By putting electrical tape on the end of the screws, this entirely elminats the screws from holding a possible charge point that the electrons in the board could jump to when the path would allow for jumping.
This would match up with the times it stalled on me most which were in the morning after I had driven 20+ minutes, and then on my way home at 4:30 after the car had been out in the sun all day. I still need more data though and also a good look at the inside of the PCM itself. This of course doesn't eliminate the solder idea at all as being a valid problem. There are probably a few different problems going on that individually cause the problem one time and that combine and cause the problem at other times. The fact that I have now been 11 days of driving without stalling once after doing the mod gives very strong evidence that the screws were one of the problems. Again, I hadn't been stall free for a month plus before the mod. On one particular day before I took it to the mechanic, It stalled on me 5 times in 30 mins on my way home. The disclaimer to this is that I have no idea what the inside of the PCM really looks like. Even from JS97ZJ's pics, I can't tell if the screw just goes into gel or if there is an air pocket between a bare part of the board and the end of the screw. If the screw goes into the gel and the gel does have a dielectric capacity (higher than that of air obviously) as it should....maybe the screw is hitting an expanded gel and electricity is being conducted to the screw. I don't know, but that's my best guess with what I've got. If someone wants to send me a "broken" 96 ZJ PCM, I would be more than happy to investigate this particular hypothesis, lol.